Soil heat flux in permafrost: Characteristics and accuracy of measurement
Abstract Soil heat flux plates are a standard method of measuring soil heat flux in energy balance and related studies. Recent work has suggested that heat flux plates significantly underestimate the true flux value in permafrost terrain. Using data from two sites near Churchill, Manitoba, collected...
Published in: | Journal of Climatology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1987
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/joc.3370070605 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.3370070605 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.3370070605 |
id |
crwiley:10.1002/joc.3370070605 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/joc.3370070605 2024-06-23T07:52:07+00:00 Soil heat flux in permafrost: Characteristics and accuracy of measurement Halliwell, David H. Rouse, Wayne R. 1987 http://dx.doi.org/10.1002/joc.3370070605 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.3370070605 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.3370070605 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Climatology volume 7, issue 6, page 571-584 ISSN 0196-1748 journal-article 1987 crwiley https://doi.org/10.1002/joc.3370070605 2024-05-31T08:12:31Z Abstract Soil heat flux plates are a standard method of measuring soil heat flux in energy balance and related studies. Recent work has suggested that heat flux plates significantly underestimate the true flux value in permafrost terrain. Using data from two sites near Churchill, Manitoba, collected over two summer thaw periods, the calorimetric method of soil heat flux determination is used to assess the reliability of heat flux plate data. It is found that the heat flux plates underestimate the surface heat flux in organic permafrost terrain by about 50 per cent. The most likely cause of the error appears to be a combination of poor thermal contact between the plate and the peat soil, and possible vapour transport through the porous material. Recommendations are made to reduce errors in field determinations of soil heat flux. The calorimetric calculations indicate that the largest portion of the soil heat flux is stored as latent heat in the thawing of ground ice. The flux at 1–5 m depth constitutes a significant portion of the surface flux. The smallest component of the surface flux is the portion stored as sensible heat in the layer between the surface and the 1–5 m depth. Overall, the soil heat flux represents a high fraction (from 16 per cent to 18 per cent) of the net all‐wave radiation available at the surface. Article in Journal/Newspaper Churchill Ice permafrost Wiley Online Library Journal of Climatology 7 6 571 584 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Soil heat flux plates are a standard method of measuring soil heat flux in energy balance and related studies. Recent work has suggested that heat flux plates significantly underestimate the true flux value in permafrost terrain. Using data from two sites near Churchill, Manitoba, collected over two summer thaw periods, the calorimetric method of soil heat flux determination is used to assess the reliability of heat flux plate data. It is found that the heat flux plates underestimate the surface heat flux in organic permafrost terrain by about 50 per cent. The most likely cause of the error appears to be a combination of poor thermal contact between the plate and the peat soil, and possible vapour transport through the porous material. Recommendations are made to reduce errors in field determinations of soil heat flux. The calorimetric calculations indicate that the largest portion of the soil heat flux is stored as latent heat in the thawing of ground ice. The flux at 1–5 m depth constitutes a significant portion of the surface flux. The smallest component of the surface flux is the portion stored as sensible heat in the layer between the surface and the 1–5 m depth. Overall, the soil heat flux represents a high fraction (from 16 per cent to 18 per cent) of the net all‐wave radiation available at the surface. |
format |
Article in Journal/Newspaper |
author |
Halliwell, David H. Rouse, Wayne R. |
spellingShingle |
Halliwell, David H. Rouse, Wayne R. Soil heat flux in permafrost: Characteristics and accuracy of measurement |
author_facet |
Halliwell, David H. Rouse, Wayne R. |
author_sort |
Halliwell, David H. |
title |
Soil heat flux in permafrost: Characteristics and accuracy of measurement |
title_short |
Soil heat flux in permafrost: Characteristics and accuracy of measurement |
title_full |
Soil heat flux in permafrost: Characteristics and accuracy of measurement |
title_fullStr |
Soil heat flux in permafrost: Characteristics and accuracy of measurement |
title_full_unstemmed |
Soil heat flux in permafrost: Characteristics and accuracy of measurement |
title_sort |
soil heat flux in permafrost: characteristics and accuracy of measurement |
publisher |
Wiley |
publishDate |
1987 |
url |
http://dx.doi.org/10.1002/joc.3370070605 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.3370070605 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.3370070605 |
genre |
Churchill Ice permafrost |
genre_facet |
Churchill Ice permafrost |
op_source |
Journal of Climatology volume 7, issue 6, page 571-584 ISSN 0196-1748 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.3370070605 |
container_title |
Journal of Climatology |
container_volume |
7 |
container_issue |
6 |
container_start_page |
571 |
op_container_end_page |
584 |
_version_ |
1802643336708751360 |